GERM-CELL CONTAINS NO SKELETON. 57 



titative difference in nuclein or the colored nuclear 

 matter which comes from both parents in the act of 

 conception.' (Ev. Man, p. 57.) 



Haeckel continues, (p. 57) : 



"Quite in harmony with this new conception of 

 the equivalence of the two gonads (ovum nrsd sperm- 

 atozoon) on the equal physiological importance of the 

 male and female sex-cells and their equal share in 

 the process of heredity, is the important fact estab- 

 lished by Hertwig that in normal impregnation only 

 one single spermatozoon copulates with one ovum ; the 

 membrane which is raised on the surface of the yelk 

 immediately after one sperm-cell has penetrated, pre- 

 vents any others from entering. All the rivals of the 

 fortunate penetrator die without.' (Ev. Man, pp. 57- 

 58.) 



Sec. 17. Germ-Cell Does Not Contain Any 

 Skeleton, Model nor Performed Out- 

 line of the Coming Embryo 



At this point it should be noted that the stem- 

 cell does not contain any skeleton, model nor other 

 preformed outline of the coming embryo for the fol- 

 lowing reasons: (1) neither the ovum nor the sperm- 

 atozoon contains any such skeleton, model nor outline ; 

 and if each of them contain such a thing, both would 

 be destroyed when these primary cells fuse and merge 

 into the germ-cell. (2) The germ-cell first divides 

 into two, four, eight, sixteen, thirty-two, and sixty- 



